Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 106,835	$ 93,557	$ 87,383
Balance	166,670	106,835	93,557
Unrealized Gains (Losses) on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	3,602	(1,095)	1,804
Other comprehensive income (loss) before reclassifications, net of tax	5,441	4,708	(2,470)
Amounts reclassified from accumulated other comprehensive income, net of tax	(91)	(11)	(8)
Net current-period other comprehensive income (loss)	5,350	4,697	(2,899)
Balance	$ 8,952	3,602	(1,095)
ASU 2016-01 [Member] | Unrealized Gains (Losses) on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		$ (421)
Balance			$ (421)